Daikin R71FUV1 Service Manual page 141

Si20-701_B
A
134
Reverse phase power
supply.
Is the power supply
phase correct?
Low pressure switch
activation.
Is the stop valve fully
opened?
Is the refrigerant
piping circuit clogged?
Is the refrigerant
charged correctly or
leaked?
High pressure switch
activation.
Does the outdoor unit
fan operate properly?
Is the outdoor unit heat
exchanger clogged?
Is the outdoor unit
installed properly?
(Outdoor air short
circuit etc.)
Is the refrigerant
overcharged?
Does the air enter the
refrigerant system?
Troubleshooting by Remote Controller
Change the
phase if the
power supply is
not correct.
Open the stop
valve.
Replace the
clogged part.
Check and repair
the leaked part
and charge
refrigerant
correctly.
Check and
replace the
outdoor unit fan
motor.
Clean the heat
exchanger.
Correct
installation.
Conduct
refrigerant
collection and
vacuum drying,
and then add
proper amount
refrigerant.
Conduct
refrigerant
collection and
vacuum drying,
and then add
proper amount
refrigerant.